Haeser's Coefficient
Historical document, translated for reference. It reflects medical knowledge of the 1920s–30s and is not medical advice.
Summary
Haeser's coefficient is an empirically derived factor used to quantitatively estimate the total amount of solid constituents in urine. By multiplying the last three decimal places of the urine specific gravity by 0.233, one obtains the concentration of solids in grams per liter. This historical method assumes the absence of protein and sugar.
Encyclopedia entry (1928–1936)
HAESER'S COEFFICIENT (Haeser), an empirically found number used for the quantitative determination of the total sum of solid constituents of urine. For this purpose, the last 3 decimal places of the specific gravity of urine (determined inclusive of the 4th decimal place) are multiplied by 0.233, yielding the number expressing in grams the amount of solid parts in 1 liter of urine. The error of the method is ±3%. The urine must be free from protein and sugar. (Example: specific gravity of urine = 1.0155; 155 × 0.233 = 36.115 g per 1 liter.)
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Cite this page
“Haeser's Coefficient.” Soviet Medical Encyclopedia. English translation of Bolshaya Meditsinskaya Entsiklopediya, 1st ed. (Moscow, 1928–1936), ed. N. A. Semashko. https://sovietmedicalencyclopedia.pages.dev/article/haesers-coefficient/